D70 focus problems??

Discussion in 'Digital SLR' started by Erik Persson, Jan 7, 2005.

  1. Erik Persson

    JR Guest

    Well the one thing you need to note is the aperture of the image. If
    you shoot at wide open apertures on the D70, and the G3 uses smaller
    apertures than the G3 will be more sharp. Also you are at the mercy of
    the lens on this, which is very good, so that is not an issue. I would
    look to see which images are not very sharp on the D70 and note the
    aperture. The sharper images will be around f/8-f/11. If using the G3
    on auto modes, it may automatically select shutter speeds that put it at
    f/8-f/11 for sharper images. If shooting the D70 in portrait mode, then
    it will use the largest aperture it can for out of focus backgrounds.
    So it may select f/4. If this happens, less of the image is in focus,
    and the lens is not at it's optimum sharpness. These things are what I
    think are happening. The D70 is an awesome camera and it's output is
    among the best in this price range. If you want a sharper lens, get the
    50/1.8 Nikkor. At $100 it's the best you could spend. Sharp, fast,
    light. Better than ANY zoom you can buy at any price. If you want a
    zoom, then look into a 28-70/2.8 AF-S Nikkor. At like $1500. Awesome
    lens, but that 50/1.8 is sharper and better. It also teaches you to not
    rely on the zoom and be more creative, enhancing your photography
    skills.

    JR
     
    JR, Jan 8, 2005
    #21
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  2. Erik Persson

    Erik Persson Guest

    I like the D70 very much. The one thing I don't like is the softer look
    of the pictures, but I guess I could change my workflow and get as sharp
    pictures as from the G3.
    It's hard to compare the D70 and G3 since the G3 gives a very much
    larger DOF at the same aperture. As I understand, this is because of the
    smaller optics. My comparison was however based on the sharpness at the
    focus point. The reason so far could be anything, but less likely the AF
    system. I'll investigate this futher.

    I have been thinking about buying the 50/1.8. It's a little bit more
    expensive here in sweden (about $150), but it is not much money anyway.
    The 28-70/2.8 is however rather expensive here (about $2500).

    I'll absolutly be thinking of buying the 50/1.8. Thanks for the advice.

    /erik
     
    Erik Persson, Jan 8, 2005
    #22
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  3. Erik Persson

    mc Guest

    I think you are exactly right. This problem has taken several people by
    surprise during the time I've been reading this and related newsgroups.
    Professional cameras do much less enhancement by themselves than
    point-and-shoot cameras. The camera assumes that it has a much better lens
    (hence not as much need for sharpening) and that the image is going to be
    processed with software under the user's control.

    Are there settings to tell the D70 to do more sharpening? On the Digital
    Rebel you have adjustable in-camera sharpening.
     
    mc, Jan 16, 2005
    #23
  4. Erik Persson

    Erik Persson Guest

    I have now compared the cameras (d70 and powershot g3) in raw mode. When
    comparing 2 jpegs you compare the in camera processing and the actual
    tuning of the in camera processing as well as other aspects of the
    camera. Another problem exists when comparing raw, because then you
    suddenly have off camera software for raw processing. This software
    differ - some programs do a better job for a certain raw format etc.
    Even if you use the same program for the raw processing, the tuning of
    the software could differ between different types of raw formats. I used
    photoshop camera raw to do the comparison. This even though nicon
    capture maybe could do a better job.
    The both raw pictures, without any sharpening or contrast enhancement
    etc, looked about the same. Since they were rather soft, it was hard to
    see if one or the other was softer. I tried to see any differences, but
    they looked very much the same in terms of sharpness. When applying the
    same amount of sharpening (as judged by the camera raw plugin settings)
    when converting the files from raw, the pictures where almost identical
    in terms of per pixel sharpness....

    My conclusion to the D70 soft picture "problem" is thus that the in
    camera tuning for jpeg processing will give you softer looking pictures
    in the D70.
    The reasons for the conclusion are, as stated above, the more or less
    identical softness of the low processed raws, the almost identical
    sharpness of the sharpened raws and the fact that I could not see any
    back or front focus in my focus tests of the D70. It would affect the
    reasoning to some degree if camera raw in any way differed to the
    advantage of either of the cameras.

    /erik
     
    Erik Persson, Jan 16, 2005
    #24
  5. Erik Persson

    Roger Guest

    Try it with some other lenses. The try using manual focus. (Use a
    tripod to get the best images. If necessary even go as far as using
    the remote or self timer to key it.

    I ended up sending mine in under warranty as it would no longer focus
    to infinity. That affected the focus at other ranges as well. it
    took about two weeks and it came back with the latest firm ware at the
    time.

    Roger Halstead (K8RI & ARRL life member)
    (N833R, S# CD-2 Worlds oldest Debonair)
    www.rogerhalstead.com
     
    Roger, Jan 16, 2005
    #25
  6. Yes. In fact, the D70 has manual settings for almost everything.
    However, if you use one of the program modes, you get the settings for
    that particular program.

    There are 7 sharpening levels: none, low, medium low, normal, medium high,
    high, and auto. Auto is the default mode.

    Merritt
     
    Merritt Mullen, Jan 17, 2005
    #26
  7. Erik Persson

    Erik Persson Guest

    I have done some testing and my conclusions are that there is no
    significant back focusing in my camera. The reason for the softer
    looking pictures is likely to be a less agressive, compared to G3, in
    camera default sharpening.

    /erik
     
    Erik Persson, Jan 22, 2005
    #27
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